The distinction between free enterprise and capitalism is rather arbitrary. If enterprises are free to do as they will with their business and capital - then by what right does a government or people prevent, for example, their choice to merge operations under the same company?
The problem that society is always presented with is: "I did not break the law, I just violated your trust."
This is the same under any market system - even the free market. No system can remove, from the people who comprise it, the ambitions to dominate others. There are systems that allow us opportunities to compartmentalize the damage such people cause, and systems which institutionalize that damage. Failure to address the problem leads to the same result in either case - capitalism just gives us more time to act.
Of course, when the monetary system, itself, has become an asset of privately owned monopolies and the government an addict to debt, the only practical outcome is a monetary collapse amid government default as it is impossible to expect future generations to enslave themselves to the service of long dead members of society and their orgiastic spending sprees.